CN209324770U - A kind of hydraulic control valve, concrete pumping equipment high-low pressure automatic switching valve and hydraulic system - Google Patents
A kind of hydraulic control valve, concrete pumping equipment high-low pressure automatic switching valve and hydraulic system Download PDFInfo
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- CN209324770U CN209324770U CN201821126223.2U CN201821126223U CN209324770U CN 209324770 U CN209324770 U CN 209324770U CN 201821126223 U CN201821126223 U CN 201821126223U CN 209324770 U CN209324770 U CN 209324770U
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- 238000005086 pumping Methods 0.000 title claims abstract description 26
- 239000012530 fluid Substances 0.000 claims abstract description 133
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 22
- 239000003921 oil Substances 0.000 claims description 95
- 239000002828 fuel tank Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims 1
- 210000004907 gland Anatomy 0.000 abstract description 11
- 241000009298 Trigla lyra Species 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 13
- 238000012423 maintenance Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
Abstract
The utility model provides a kind of concrete pumping equipment high-low pressure automatic switching valve and hydraulic system, including at least two hydraulic control valves, setting check valve V1 and check valve V2 a pair of check valve in hydraulic control valve body, the inner cavity of check valve by being divided into valve body cavity and mandril chamber inside outside, it is correspondingly arranged on check valve body and mandril, gland closed valve inner cavity is simultaneously connect by reset spring with check valve body, the mobile stroke of check valve body, valve body chamber when check valve body is in range are divided between gland and check valve body；Valve body cavity wall is provided with hydraulic fluid port；Through-hole connection mandril chamber is provided between the mandril end face of check valve V1 and the mandril end face of check valve V2, through-hole side wall sets oil-control hole；Channel is provided between check valve V1, check valve V2 mandril chamber, hydraulic oil enters oil-control hole by pushing mandril to make check valve body to gland slip, to open valve body cavity, two hydraulic fluid ports realize connection.The utility model structure is simple and convenient to operate, and is able to achieve the quick commutation work of high-low pressure.
Description
Technical field
The utility model belongs to engineering machinery field, and in particular to a kind of concrete pumping equipment (including pump truck, Vehicle loaded pump
And concrete pump) high-low pressure automatic switching valve and hydraulic system.
Background technique
Currently, concrete pumping equipment (including pump truck, Vehicle loaded pump and concrete pump), according to construction height, distance and
The requirement of conveying capacity, need using be pumped by with low pressure pump mutually switching, the present high low switching of concrete pumping equipment
There are three types of methods, one is using valve block is rotated, manually switches, the disadvantage is that manual operation is needed, troublesome, time length and people
Leakage pressure oil when work operates pollutes environment, also dangerous.Second is that switching high-low pressure using two six-way valves, the disadvantage is that cost
Height, since pipeline is long, Yi Shengre causes hydraulic fluid temperature high, generates oil seepage phenomena, cause equipment sometimes cannot normal work
Make.The third is using multiple inserting Vavle switchings, the disadvantage is that high, at high cost, easy to hydraulic oil, fluid pressure line required precision
Bad, maintenance inconvenience, maintenance cost is high, and difficulty is big, high to the technical requirements of maintenance personal.
Utility model content
In order to overcome drawbacks described above, provide a kind of concrete pumping equipment high-low pressure automatic switching valve and hydraulic system with
Meet easy switching, easy to maintenance, operationally reliable requirement.
In order to achieve the above object, a kind of hydraulic control valve, the hydraulic control valve include that the hydraulic control valve includes
Two check valve V1 independent, check valve V2, the inner cavity of the check valve by be divided into inside outside valve body cavity, seal chamber and
Mandril chamber is provided with seal chamber between the valve body cavity and the mandril chamber；
Reset spring and check valve body, the setting of check valve body nearly mandril chamber side are provided in the valve body cavity；
The intracavitary piston that mandril is set and is integrally coaxially disposed with mandril of the mandril, the remote valve body cavity side of the piston
Setting；
It further include an oil passage, the oil passage is connected to two mandril chambers；
The check valve body is sequentially divided into guide section, excessively oily section and seal section along axial direction, and the guide section is close to described multiple
Position spring one end；
The check valve body pushes the mandril chamber under the action of the reset spring, and the seal section and seal chamber are close
Envelope cooperation；
Oily hydraulic fluid port was offered in the position that the valve body cavity wall corresponds to the excessively oily section；
The mandril length is greater than the valve body slides stroke length；
The mandril chamber end of check valve V1 and the mandril chamber end of check valve V2 are provided with control port；
When no hydraulic oil enters the control port, due to the effect of reset spring, the check valve body is maintained at institute
It states in valve body cavity close to mandril chamber one end, is closed between the mandril chamber and the valve body cavity；
When high pressure liquid pressure oil enters the mandril chamber by the control port, hydraulic oil pushes the piston of the mandril
Keep the mandril mobile to valve body cavity direction, pushes the check valve body to move to reset spring direction so as to cause the mandril
It is dynamic, it is connected to the valve body cavity with the mandril chamber, so that the hydraulic fluid port of oil excessively of check valve V1, valve body cavity V1, mandril chamber V1, excessively oily
Channel, mandril chamber V2, valve body cavity V2, valve body cavity V2 excessively oily hydraulic fluid port be connected.
Further, the check valve V1 and check valve V2 is coaxially oppositely arranged, and each mandril position is close.
Further, the setting connection block on the outside of hydraulic control valve body, by the mandril of the check valve V1 and check valve V2
Chamber connection.
A kind of concrete pumping equipment high-low pressure automatic switching valve includes more than two above-mentioned any one of liquid
Pressure control valve.
Further, the one-way valve axis of hydraulic control valve described in two is arranged in parallel.
A kind of hydraulic system using above-mentioned concrete pumping equipment high-low pressure automatic switching valve, the system include oil cylinder
G1, oil cylinder G2 and high-low pressure automatic switching valve Z1, high-low pressure automatic switching valve Z2, high-low pressure automatic switching valve Z3 and two-way are changed
To valve D1 and two way selected valve D2；The oil cylinder G1, the oil cylinder G2 are both provided with piston rod；
The high-low pressure automatic switching valve Z2 is provided with high voltage control hydraulic fluid port K21 and low voltage control hydraulic fluid port K22,
High voltage control hydraulic fluid port K21 control port B21, hydraulic fluid port B22, low voltage control hydraulic fluid port K22 control port B23, hydraulic fluid port
B24；
The high-low pressure automatic switching valve Z1 is provided with high voltage control hydraulic fluid port K11 and low voltage control hydraulic fluid port K12,
High voltage control hydraulic fluid port K11 control port B11, hydraulic fluid port B12, low voltage control hydraulic fluid port K12 control port B13, hydraulic fluid port
B14；
The high-low pressure automatic switching valve Z3 is provided with high voltage control hydraulic fluid port K31 and low voltage control hydraulic fluid port K32,
High voltage control hydraulic fluid port K31 control port B31, hydraulic fluid port B32, low voltage control hydraulic fluid port K32 control port B33, hydraulic fluid port
B34；
Hydraulic fluid port B21, hydraulic fluid port B14 pass through oil pipe respectively and are connected to the rod chamber of oil cylinder G1；
Hydraulic fluid port B23, hydraulic fluid port B12 pass through oil pipe respectively and are connected to the rodless cavity of oil cylinder G1；
Hydraulic fluid port B22, hydraulic fluid port B34 pass through oil pipe respectively and are connected to the rod chamber of oil cylinder G2；
Hydraulic fluid port B24, hydraulic fluid port B32 pass through oil pipe respectively and are connected to the rodless cavity of oil cylinder G2；
Hydraulic fluid port B11, hydraulic fluid port B13 are connected in parallel in the work oil outlet d1 of two way selected valve D1；
Hydraulic fluid port B31, hydraulic fluid port B33 are connected in parallel in the work oil outlet d2 of two way selected valve D1；
The oil inlet of two way selected valve D1 is connect by oil inlet pipe with oil pump, and the oil return opening of two way selected valve D1 passes through back
Oil pipe line is connect with fuel tank；
High voltage control hydraulic fluid port K11, hydraulic fluid port K21, hydraulic fluid port K31 are connected in parallel in the work oil inlet f1 of two way selected valve D2；
Low voltage control hydraulic fluid port K12, hydraulic fluid port K22, hydraulic fluid port K32 are connected in parallel in the work oil inlet f2 of two way selected valve D2；
The oil inlet of two way selected valve D2 is connect by oil inlet pipe with oil pump, and the oil return opening of two way selected valve D2 passes through back
Oil pipe line is connect with fuel tank.
Since the utility model is provided with high and low pressure job control hydraulic fluid port at mandril end, pressure fluid can pass through high and low pressure
Job control hydraulic fluid port enters valve body and pushes mandril, and mandril pushes check valve body, so as to open the company of valve body cavity and mandril chamber
Connect road；Due to being connected between the mandril chamber of v1 and the mandril chamber of v2, it is thus achieved that the connection between two valve body cavities；
Because valve body cavity is provided with the external hydraulic fluid port of communicating valve, so final result leads to the connection between two hydraulic fluid ports；Without pressure
It is blocking state between hydraulic fluid port when liquid enters, hydraulic system can be by changing by the oil inlet of high and low pressure job control hydraulic fluid port
It is easily controlled to valve, changes flow direction of the hydraulic oil in pipeline, Jin Ergai by changing the combination of hydraulic fluid port connection
Become the working condition of hydraulic cylinder；Realize the conversion of high-low pressure working condition.
The utility model has structure simple, easy to operate, can be switched fast concrete pumping equipment height crush-cutting automatically
It changing jobs, reliable operation, volume is few, hydraulic oil ne-leakage, and it is at low cost, it is low to the technical requirements of maintenance personal, it is easy to maintenance, together
Shi Yinqi is not easy heat without pipeline, hydraulic oil.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawings and examples
Fig. 1 is the main view of concrete pumping equipment high-low pressure automatic switching valve
Fig. 2 is the top view of Fig. 1
Fig. 3 is the left view of Fig. 1
Fig. 4 is to be pumped by under working condition Fig. 1 along the cross-sectional view of line A-A
Fig. 5 is Fig. 1 under low pressure pumping working condition along the cross-sectional view of line A-A
Fig. 6 is the B-B cross-sectional view of Fig. 2
Fig. 7 is the C-C cross-sectional view of Fig. 4
Fig. 8 is to be pumped by under working condition Fig. 4 along the cross-sectional view of line D-D
Fig. 9 is to be pumped by under working condition Fig. 4 along the cross-sectional view of E-E line
Figure 10 is Fig. 5 under low pressure pumping working condition along the cross-sectional view of F-F
Figure 11 is Fig. 5 under low pressure pumping working condition along the cross-sectional view of G-G line
Figure 12 is the main hydraulic system schematic diagram that pumping equipment uses high-low pressure automatic switching valve
Figure 13 is pumping equipment (pump truck, Vehicle loaded pump, concrete pump) main electric system schematic diagram
In figure, 1-gland I；2-high-low pressures convert valve body；3-connection blocks I；4-glands II；5-glands III；6-even
Logical block II；7-glands IV；8-reset springs III；9-check valve bodies III；10-mandrils III；11-mandrils IV；12-is unidirectional
Valve body IV；13-reset springs IV；14-reset springs II；15-check valve bodies II；16-mandrils II；17-mandrils I；18—
Check valve body I；19-reset springs I；20-fuel tanks；21-liquidometers；22-air filters；23-oil absorption filters；24-return
Oil strainer；25-motors；26-constant output pumps；27-coolers；28-throttle valves；29-overflow valves；30-pressure gauges；
31-electro-hydraulic reversing valves；32.1-high-low pressure automatic switching valves I；32.2-high-low pressure automatic switching valves II；32.3-high-low pressure
Automatic switching valve III；33-oil cylinders I；34-oil cylinders II；35-solenoid directional control valves；36-pipelines I；37-pipelines II；38-pipes
Road III；39-pipelines IV；40-master cylinder, I piston rod；41-master cylinder, II piston rod；42-motor stop buttons；43-electricity
Machine start button；44-pumping stop buttons；45-pumping buttons；46-counter pump button；47-low pressure switching push buttons
X1-high-pressure work control port；X2-operating on low voltage control port；
B1, B2, B3, B4 are high-low pressure automatic switching valve hydraulic fluid port；
A1, A2, A3, A4 are oil pocket；
C1, C2, C3, C4, C5, C6, C7, C8, C9, C10 are control oil circuit；
K1, K2 are close to switch；
KM1 is ac contactor mouth；
KA1, KA2, KA3 are contactor；
Specific embodiment
Embodiment is described further with reference to the accompanying drawing.
Embodiment
The present embodiment provides a kind of the embodiments of the present invention,
As shown in Fig. 1-Figure 11, the two sides of high-low pressure conversion valve body 2 are provided with connection and block I 3 and are connected to block II 6, connection
High-low pressure is converted the A1 chamber in valve body 2 and be connected to A2 chamber by block I 3, connection block II 6 height is pressed change A3 chamber in valve body 2 and
The connection of A4 chamber；
Left side in high-low pressure conversion valve body 2, is arranged in parallel with check valve body I 18, check valve body III 9, in check valve
The left side of body I 18 is provided with reset spring I 19, and the other end of reset spring I 19 is connected with gland I, on the right side of check valve I 18
It is provided with mandril I 17；
The left side of check valve III 9 is provided with reset spring III 8, the other end of reset spring III 8 is connected with gland III 5,
The right side of check valve body III 9 is provided with mandril III 10；
Right side in high-low pressure conversion valve body 2, is arranged in parallel with check valve body II 15, check valve body IV 12；
The right side of check valve body II 15 is provided with reset spring II 14, the other end and gland II 4 of reset spring II 14
It is connected, the left side of check valve body II 15 is provided with mandril II 16；
The right side of check valve body IV 12 is provided with reset spring IV 13, the other end and gland IV 7 of reset spring IV 13
It is connected, the left side of check valve body IV 12 is provided with mandril IV 11；
High-pressure work control port X1, operating on low voltage control port X2 are provided on high-low pressure conversion valve body 2.In height
It is provided with hydraulic fluid port B1, hydraulic fluid port B2, hydraulic fluid port B3, hydraulic fluid port B4 on pressure conversion valve body 2,
As shown in figure 12, there are three high for setting in pumping equipment (pump truck, Vehicle loaded pump, concrete pump) main hydraulic system
Low pressure automatic switching valve 32.1, high-low pressure automatic switching valve 32.2, high-low pressure automatic switching valve 32.3.Motor 25 and invariable power
Pump 26 is connected, and constant output pump 26 is connected by oil absorption filter 23 with fuel tank 20, and constant output pump 26 passes through pipeline I 36 and electricity
Liquid reversal valve 31 is connected, and electro-hydraulic reversing valve 31 is connected by pipeline II 37 with hydraulic fluid port B1, B3 of high-low pressure automatic switching valve 32.1,
The hydraulic fluid port B2 of high-low pressure automatic switching valve 32.1 is connected with the rodless cavity of master cylinder I 33, the oil of high-low pressure automatic switching valve 32.1
Mouth B4 is connected with the rod chamber of master cylinder I 33.
Electro-hydraulic reversing valve 31 is connected by pipeline III 38 with the hydraulic fluid port B1 of high-low pressure automatic switching valve 32.2, hydraulic fluid port B3, high
The hydraulic fluid port B2 of low pressure automatic switching valve 32.2 is connected with the rodless cavity of master cylinder II 34, the hydraulic fluid port of high-low pressure automatic switching valve 32.2
B4 is connected with the rod chamber of master cylinder II 34.
The rod chamber of master cylinder I 33 is connected with the hydraulic fluid port B1 of high-low pressure automatic switching valve 32.3, master cylinder I 33 without bar
Chamber is connected with the hydraulic fluid port B3 of high-low pressure automatic switching valve 32.3, the hydraulic fluid port B2 and master cylinder II of high-low pressure automatic switching valve 32.3
34 rod chamber is connected；
The hydraulic fluid port B4 of high-low pressure automatic switching valve 32.3 is connected with the rodless cavity of master cylinder II 34；
Control oil IV 39 is connected by the road with solenoid directional control valve 35, solenoid directional control valve 35 by control piper C1, control and manage
Road C3, control piper C4, control piper C9, control piper C10 and high-low pressure automatic switching valve 32.1, high-low pressure automatic conversion
Valve 32.2, the high-pressure work control port X1 of high-low pressure automatic switching valve 32.3 are connected, and solenoid directional control valve 35 passes through control piper
C2, control piper C5, control piper C6, control piper C7, control piper C8 and high-low pressure automatic switching valve 32.1, high-low pressure
Automatic switching valve 32.2, high-low pressure automatic switching valve 32.3 operating on low voltage control port X2 be connected, electro-hydraulic reversing valve 31 and overflow
The oil return of stream valve 29 is connected by throttle valve 28, cooler 27, return filter 24 with fuel tank 20；Solenoid directional control valve 35 returns
Oil is connected with fuel tank 20.
It is automatic using concrete pumping equipment provided by the utility model (pump truck, Vehicle loaded pump, concrete pump) high-low pressure
When switching valve, electric motor starting button 43, driving 26 fuel feeding of constant output pump are pressed, presses pumping button 45,1DT energization, 2DT, 3DT at this time
Power-off；
Electro-hydraulic reversing valve 1 is in left position, solenoid directional control valve 35 in right position, the oily IV 39 entrance electricity by the road of control at this time at this time
The right position of magnetic reversal valve 35, control oil circuit C1, control piper C3, control piper C4, control piper C9, control piper C10 are entered
High-low pressure automatic switching valve I 32.1, high-low pressure automatic switching valve II 32.2, high-low pressure automatic switching valve III 32.3 high-pressure work
Control port X1, the control hydraulic oil for entering high-pressure work control port X1 push mandril I 17, mandril II 16 to move to both sides
It is dynamic, push check valve body I 18, check valve body II 15 mobile to both sides by mandril I 17, mandril II 16, and compression reseting spring
I 19, reset spring II 14 is mobile to gland I 1, gland II 4, while by high-low pressure automatic switching valve I 32.1, II 32.2, III
Hydraulic fluid port B1, oil pocket A1 on 32.3 are connected to by link block I 3 with oil pocket A2, hydraulic fluid port B2, while high-low pressure automatic switching valve I
32.1, the control of high-low pressure automatic switching valve II 32.2, operating on low voltage control port X2 on high-low pressure automatic switching valve III 32.3
Right position oil return box of the liquefaction through C2, control piper C5, control piper C6, control piper C7, control piper C8, solenoid directional control valve 35
20。
Simultaneously under the action of reset spring III 8, reset spring IV 13, by check valve III 9, check valve IV 12 and mandril
III 10, mandril IV 11 pushes the centre of high-low pressure conversion valve body 2 to, while high-low pressure being converted to the hydraulic fluid port B3 and hydraulic fluid port B4 of valve body 2
Closing.
Hydraulic oil I 36, the left position of electro-hydraulic reversing valve 31, pipeline II 37, high-low pressure by the road that constant output pump 26 supplies at this time
Hydraulic fluid port B1, the hydraulic fluid port B2 of automatic conversion valve body I 32.1 enter the rodless cavity of master cylinder I 33, push the piston rod 40 of master cylinder I
Advance.Meanwhile the hydraulic oil of the rod chamber of master cylinder I 33 enters through hydraulic fluid port B1, B2 on high-low pressure automatic switching valve III 32.3
To the rod chamber of master cylinder II 34, retreat the piston rod 41 of master cylinder II, the hydraulic oil of II 34 rodless cavity of master cylinder is through height
The automatic dress of pressure changes hydraulic fluid port B1 on valve II 32.2, hydraulic fluid port B2, pipeline III 38, the left position of electro-hydraulic reversing valve 31, throttle valve 28, cold
But device 27,24 oil return box 20 of return filter；
When I piston rod 40 of master cylinder proceeds to stroke end, automatic touch close to switch K1 keeps 1DT power-off, 2DT logical
Electricity, electro-hydraulic reversing valve 31 is in right position, at this point, the hydraulic oil diameter pipeline I 36 of constant output pump confession, the right position of electro-hydraulic reversing valve 31, pipeline
III 38, high-low pressure fills the hydraulic fluid port B1 for changing valve II 32.2 automatically, hydraulic fluid port B2 enters the rodless cavity of master cylinder II 34, pushes main oil
II piston rod 41 of cylinder advances.The hydraulic oil of the rod chamber of master cylinder II 34 is through on high-low pressure automatic switching valve III 32.3 simultaneously
Hydraulic fluid port B1, hydraulic fluid port B2 enter the rod chamber of master cylinder I 33, retreat I piston rod 40 of master cylinder, I 33 rodless cavity of master cylinder
Hydraulic oil fills the hydraulic fluid port B1 for changing valve I 32.1, hydraulic fluid port B2, pipeline II 37, the right position of electro-hydraulic reversing valve 31, throttling through high-low pressure automatically
Valve 28, cooler 27,24 oil return box 20 of return filter, a cycle of higher pressure terminate.
When II piston rod 41 of master cylinder proceeds to stroke end, touches and be powered, 2DT power-off, make close to switch K2,1DT
31 left position of electro-hydraulic reversing valve, second circulation start, circuit sequentially, and making concrete pumping, (pump truck, Vehicle loaded pump, concrete drag
Pump) it is in high-pressure work state always, the height of conveying is high, conveying distance is remote, sees Fig. 4, Fig. 8, Fig. 9.
When concrete pump (pump truck, Vehicle loaded pump, concrete pump) needs low pressure huge discharge, operating on low voltage is needed: at this time
By low pressure switching push button 47,3DT are powered, solenoid directional control valve 35 is in left position, Fig. 5, Figure 10, Figure 11 are seen.
At this point, controlling oily diameter pipeline IV 39,35 left position of solenoid directional control valve, control oil circuit C2, C5, C6, C7, C8 are entered
The operating on low voltage control port X2 of high-low pressure automatic switching valve I 32.1, II 32.2, III 32.3, enters the control hydraulic oil of X2
It pushes mandril III 10, mandril IV 11 mobile to both sides, check valve body III 9, check valve body is pushed by mandril III 10, mandril IV 11
IV 12, and compression reseting spring III 8, reset spring IV 13 are mobile to gland III 5, gland IV 7, meanwhile, high-low pressure automatic conversion
Valve I 32.1, high-low pressure automatic switching valve II 32.2, the hydraulic fluid port B3 on high-low pressure automatic switching valve III 32.3, oil pocket A3 pass through company
Block II 6 is connect to be connected to oil pocket A4, hydraulic fluid port B4.Meanwhile high-low pressure automatic switching valve I 32.1, high-low pressure automatic switching valve II 32.2,
Control oil circuit C9, control oil circuit C10, the control oil circuit of high-pressure work control port X1 on high-low pressure automatic switching valve III 32.3
C4, control oil circuit C3, the left position oil return box 20. of oil circuit C1, solenoid directional control valve 35 is controlled at this time in reset spring I 19, reset bullet
Under the action of spring II 14, push check valve body I 18, check valve body II 15 and mandril I 17, mandril II 16 to high-low pressure conversion valve body
Among 2；Hydraulic fluid port B1, B2 of high-low pressure automatic conversion valve body 2 are closed simultaneously.Pumping button 45 is pressed at this time, and 1DT is powered, electro-hydraulic
Reversal valve 31 is in left position, the hydraulic oil that constant output pump 26 supplies I 36,31 left position of electro-hydraulic reversing valve, pipeline II 37, high-low pressure by the road
Hydraulic fluid port B3, B4 of automatic conversion valve block I 32.1 enter the rod chamber of master cylinder I 33, and I piston rod 40 of master cylinder is pushed to retreat,
The hydraulic oil of the rodless cavity of master cylinder I 33 enters master through the hydraulic fluid port B3 of high-low pressure auto-steering valve III 32.3, hydraulic fluid port B4 simultaneously
The rodless cavity of oil cylinder II 34, pushes II piston rod 41 of master cylinder to advance, and II 34 rod chamber hydraulic oil of master cylinder is automatic through high-low pressure
Hydraulic fluid port B4, hydraulic fluid port B3, the left position of electro-hydraulic reversing valve 31, throttle valve 28, the cooler 27, return filter of switching valve II 32.2
24 oil return boxes 20 when touching close switch K2, power off 1DT, 2DT when II piston rod 41 of master cylinder proceeds to stroke end
It is powered, electro-hydraulic reversing valve 31 is in right position, the hydraulic oil that constant output pump 26 supplies at this time I 36, the right position of electro-hydraulic reversing valve 31, pipe by the road
Hydraulic fluid port B3, B4 on road III 38, high-low pressure automatic switching valve II 32.2 enter the rod chamber of master cylinder II 34, push master cylinder
II piston rod 41 retreat, while II 34 rodless cavity hydraulic oil of master cylinder through on high-low pressure automatic switching valve III 32.3 hydraulic fluid port B3,
Hydraulic fluid port B4 enters the rodless cavity of master cylinder I 33, pushes I piston rod 40 of master cylinder to advance, while the liquid of I 33 rod chamber of master cylinder
Pressure oil diameter high-low pressure fills the hydraulic fluid port B4 changed on valve I 32.1, hydraulic fluid port B3, the right position of electro-hydraulic reversing valve 31, throttle valve 28, cold automatically
But device 27,24 oil return box 20 of return filter, a low pressure recycle terminate, when I piston rod 40 of master cylinder proceeds to stroke end
When, it touches and is powered close to switch K1,1DT, 2DT power-off makes the commutation of electro-hydraulic reversing valve 31 in left position, and second circulation starts, according to
Secondary circulation makes concrete mixer (pump truck, Vehicle loaded pump, concrete pump) always in operating on low voltage state；
Wherein the pressure of pipeline I 36 is adjusted by overflow valve 29 and is shown by pressure gauge 30；Throttle valve 28 is used to adjust control
The pressure of oil.
The above is only the preferred embodiments of the utility model, and but protection scope of the utility model is not limited thereto, appoint
What those skilled in the art within the technical scope disclosed by the utility model, can make change easily in form and details,
It should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with claim institute circle
Subject to fixed protection scope.
Claims (6)
1. a kind of hydraulic control valve, it is characterised in that: the hydraulic control valve includes two check valve V1 independent, unidirectional
Valve V2, in the inner cavity of the check valve by being divided into valve body cavity, seal chamber and mandril chamber, the valve body cavity and the mandril inside outside
Seal chamber is provided between chamber；
Reset spring and check valve body, the setting of check valve body nearly mandril chamber side are provided in the valve body cavity；
The intracavitary piston that mandril is arranged and is integrally coaxially disposed with mandril of the mandril, the remote valve body cavity side of the piston is set
It sets；
It further include an oil passage, the oil passage is connected to two mandril chambers；
The check valve body is sequentially divided into guide section, excessively oily section and seal section along axial direction, and the guide section is close to the reset bullet
Spring one end；
The check valve body pushes the mandril chamber under the action of the reset spring, and the seal section is matched with seal chamber sealing
It closes；
Oily hydraulic fluid port was offered in the position that the valve body cavity wall corresponds to the excessively oily section；
The mandril length is greater than the valve body slides stroke length；
The mandril chamber end of check valve V1 and the mandril chamber end of check valve V2 are provided with control port；
When no hydraulic oil enters the control port, due to the effect of reset spring, the check valve body is maintained at the valve
Close to mandril chamber one end in body cavity, closed between the mandril chamber and the valve body cavity；
When high pressure liquid pressure oil enters the mandril chamber by the control port, hydraulic oil pushes the piston of the mandril to make institute
It is mobile to valve body cavity direction to state mandril, pushes the check valve body mobile to reset spring direction so as to cause the mandril, makes
The valve body cavity is connected to the mandril chamber, thus the excessively oily hydraulic fluid port of check valve V1, valve body cavity V1, mandril chamber V1, oil passage,
Mandril chamber V2, valve body cavity V2, valve body cavity V2 excessively oily hydraulic fluid port be connected.
2. a kind of hydraulic control valve as described in claim 1, it is characterised in that: the coaxial phase of the check valve V1 and check valve V2
To setting, each mandril position is close.
3. a kind of hydraulic control valve as described in claim 1, it is characterised in that: connection is arranged on the outside of hydraulic control valve body
The check valve V1 is connected to by block with the mandril chamber of check valve V2.
4. a kind of concrete pumping equipment high-low pressure automatic switching valve, it is characterised in that: comprising it is more than two as claims 1 to
Hydraulic control valve described in any one claim of claim 3.
5. a kind of concrete pumping equipment high-low pressure automatic switching valve as claimed in claim 4, it is characterised in that: described in two
The one-way valve axis of hydraulic control valve be arranged in parallel.
6. a kind of use a kind of hydraulic system of concrete pumping equipment high-low pressure automatic switching valve as claimed in claim 4,
It is characterized by: the system includes oil cylinder G1, oil cylinder G2 and high-low pressure automatic switching valve Z1, high-low pressure automatic switching valve Z2, height
Low pressure automatic switching valve Z3 and two way selected valve D1 and two way selected valve D2；The oil cylinder G1, the oil cylinder G2 are both provided with
Piston rod；
The high-low pressure automatic switching valve Z2 is provided with high voltage control hydraulic fluid port K21 and low voltage control hydraulic fluid port K22,
High voltage control hydraulic fluid port K21 control port B21, hydraulic fluid port B22, low voltage control hydraulic fluid port K22 control port B23, hydraulic fluid port B24；
The high-low pressure automatic switching valve Z1 is provided with high voltage control hydraulic fluid port K11 and low voltage control hydraulic fluid port K12,
High voltage control hydraulic fluid port K11 control port B11, hydraulic fluid port B12, low voltage control hydraulic fluid port K12 control port B13, hydraulic fluid port B14；
The high-low pressure automatic switching valve Z3 is provided with high voltage control hydraulic fluid port K31 and low voltage control hydraulic fluid port K32,
High voltage control hydraulic fluid port K31 control port B31, hydraulic fluid port B32, low voltage control hydraulic fluid port K32 control port B33, hydraulic fluid port B34；
Hydraulic fluid port B21, hydraulic fluid port B14 pass through oil pipe respectively and are connected to the rod chamber of oil cylinder G1；
Hydraulic fluid port B23, hydraulic fluid port B12 pass through oil pipe respectively and are connected to the rodless cavity of oil cylinder G1；
Hydraulic fluid port B22, hydraulic fluid port B34 pass through oil pipe respectively and are connected to the rod chamber of oil cylinder G2；
Hydraulic fluid port B24, hydraulic fluid port B32 pass through oil pipe respectively and are connected to the rodless cavity of oil cylinder G2；
Hydraulic fluid port B11, hydraulic fluid port B13 are connected in parallel in the work oil outlet d1 of two way selected valve D1；
Hydraulic fluid port B31, hydraulic fluid port B33 are connected in parallel in the work oil outlet d2 of two way selected valve D1；
The oil inlet of two way selected valve D1 is connect by oil inlet pipe with oil pump, and the oil return opening of two way selected valve D1 passes through oil return pipe
Road is connect with fuel tank；
High voltage control hydraulic fluid port K11, hydraulic fluid port K21, hydraulic fluid port K31 are connected in parallel in the work oil inlet f1 of two way selected valve D2；
Low voltage control hydraulic fluid port K12, hydraulic fluid port K22, hydraulic fluid port K32 are connected in parallel in the work oil inlet f2 of two way selected valve D2；
The oil inlet of two way selected valve D2 is connect by oil inlet pipe with oil pump, and the oil return opening of two way selected valve D2 passes through oil return pipe
Road is connect with fuel tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821126223.2U CN209324770U (en) | 2018-07-17 | 2018-07-17 | A kind of hydraulic control valve, concrete pumping equipment high-low pressure automatic switching valve and hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821126223.2U CN209324770U (en) | 2018-07-17 | 2018-07-17 | A kind of hydraulic control valve, concrete pumping equipment high-low pressure automatic switching valve and hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209324770U true CN209324770U (en) | 2019-08-30 |
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ID=67705210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821126223.2U Withdrawn - After Issue CN209324770U (en) | 2018-07-17 | 2018-07-17 | A kind of hydraulic control valve, concrete pumping equipment high-low pressure automatic switching valve and hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209324770U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108716494A (en) * | 2018-07-17 | 2018-10-30 | 湖南鼎峰机械有限公司 | A kind of concrete pumping equipment high-low pressure automatic switching valve and hydraulic system |
-
2018
- 2018-07-17 CN CN201821126223.2U patent/CN209324770U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108716494A (en) * | 2018-07-17 | 2018-10-30 | 湖南鼎峰机械有限公司 | A kind of concrete pumping equipment high-low pressure automatic switching valve and hydraulic system |
| CN108716494B (en) * | 2018-07-17 | 2023-12-01 | 湖南鼎峰机械有限公司 | High-low pressure automatic switching valve of concrete pumping equipment and hydraulic system |
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Granted publication date: 20190830 Effective date of abandoning: 20231201 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190830 Effective date of abandoning: 20231201 |